Non-circular-hole-shaping machine.



E. LAUTERJUNG.

NON-CIRCULAR HOLE SHAPING MACHINE.

APPLICATION FILED NOV. 30. 1912.

1,073,252. Patented Sept. 16, 1913.

3 SHEETS-SHEET 1.

PI FIGZ.

E. LAUTERJUNG.

NON-CIRCULAR HOLE SHAPING MACHINE.

APPLIOATION FILED NOV. 30. 1912.

1,073,252, Patented Spfi. 16,1913.

3 SHEETS-SHBET 2.

E. LAUTERJUNG.

NON-CIRCULAR HOLE SHAPING MACHINE.

APPLICATION FILED NOV. 30. 1912.

1,073,252, Patented Sept. 16,1913.

3 SHEETS-SHEET 3.

FIG. 5.

FIG. 6.

FIG]

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specifieation t1" Letters retest.

Patented se t. is, was.

Application filed 'Novembe'r so, 912. Serial so. teaser.

To all whom it may concern Be it known that I, EUonN LAUTERJUNG, acitizen of the Er'npire of Germany, residing at 174 Schiitzenstrasse,Solingen, in the Empire of Germany, have invented a new and useful NonCircular-Hole-Shaping Machine, of which the following is aspecification.

My invention relates to a novel nohcircular hole shaping machine, bymeans of which it is rendered possible not only to produce thenoncircular holes more rapidly, but also to make them smaller thanh1therto. The tool vertically guided in the machine is made to out forthe upper part and to guide for the lower part the work-piece. Fromknown machines of this kind the new machine differs in that thework-piece is intermittently turned and is at the same time yieldinglypressed against the vertically reciprocating tool, until the Work isfinished The tool comprises two superposed portions, of which thethicker one during the return stroke does not leave the pattern at all,but leaves the work-piece alone so as to permit it to be fed round;

I will now proceed to describe my invention with reference to theaccompanying drawings, in which-' Figure 1 is an elevation of. the novelnoncircular hole shaping machine, the casing being shown in section andparts being broken away, Fig. 2 is a side view of the same, the casingand parts being shown in section, Fig. 3 is an upper view of the same,parts being broken away, ig= 4 shows an upper part of Fig. 2 in section,the support Fig, .5 is a Vertical section on an enlarged scale throughthe uppermost part of the machine in Fig. 2 and shows the tool and partsof the machine frame, the workpiece and the pattern, Fig. 61s ahorizontal section through the line C.-D in Fig, 5 and shows parts ofthe pattern and the work-piece, Flg, is a similar section and showsparts of a modified pattern and the work-piece, and Fig, Sis ahorizontal section on an enlarged scale through the lineA.-B in Fig.1,the casing being omitted.

Similar characters of reference refer to similar parts throughout theseveral, views.

1 denotes a pillar, the upper end of which is at31 (Figs-.2 and 4)plvotally connected with a table 12, which normally occupies ahorizontal position shown at Fig. 2, but can turn on the horizontal pin31 andcan be inslide 3 is shown as and in the pillar clined by means ofa screw-spindle 33 into a position shown at ig. 4. The screwspindle 33is at the upper end pivotally connected with the table 12 at 36 andengages in a nut 39 turnable in a crosshead 32. The crosshead 32 is madeto rock with its two horizontal trunnions 37 in suitable brackets 38, 38fastened on the pillar 1. The nut 39 is rigidly connected with ahand-wheel 40, by means of which it can be turned for raising andlowering the table 12. A slide 14 is longitudinally guided in the table12 in any known manner (see Fig. 1) and is connected with a weight 34(Fig. 2) by means of a rope 41 passing over two guiding pulleys 42, 43,In this manner the slide 14 is constantly pressed to the left in Fig. 2.

The slide 14 has a large central opening 44 (Fig. 4), in which the longthin nave 45 of a worm wheel 15 is mounted to turn, while it isprevented from longitudinal motion by means of an annular nut 16engaging its lower end. Theworm wheel 15 is rigidly connected with acircular support 17 and it will be seen, that by means of the worm wheel15 the support 17 can be turned. 4 The support 17 is to support anywork-piece 18 and pattern 19 laid on which are secured by means ofrectangular plates 20, 20 (Fig. 3) and known adjusting screws shown. Thesupport 17 has a central opening 46 for a purpose to be explained lateron,

The pillar 1 is shown as made in one with two arallel guides 2, 2 (Fig.8), between which a slide 3 is vertically guided, The

made in one with a dovetailed guide 7 for vertically guiding a smallerslide 8, The large slide 3 has a hole for a bolt 47, which passesthrough a vertical slot 48 in the small, slide 8, and it will be seen,that the two slides 3 and 8 can be displaced relatively to one anotherand vertically adjusted by means of the bolt 47 The small slide 8carries a horizontal pin 49. The pillar l rigidly connected with abracket 50 (Fig. 2), in the end of which 1 ahorizontal shaft 11 ismounted to turni. This shaft 11 has fastenetl on ita cone 51, a bevelwheel 52 and a gear wheel 53, Ahorizontal shaft 54 is mounted to turn inthe pillar 1 and carries at the rear end a large gear wheel 35 meshingwith the said gear wheel 53 and at the front end a slotted crank 10 ofany known construction. .Inthis crank 10 a pin 55 is longitudinallyadjustable in a known manner and this pin 55 is pivotally connected withthe already above mentioned pin 49 by means of a rod 9. It will now beevident, that from the cone 51 driven from without in any known mannerthe large slide 3 is reciprocated, and its stroke can be adjusted bymeans of the adjustable pin 55.

From the guides 2, 2 the slide 3 projects upward and is .provided with alug 4 (Figs. 2 and 4) at right angles to it. On this lug 4 is fastened avertical cylindrical support or chuck 5 (Fig. 5) the upper end of whichis bored and can receive a vertical tool 6 that is to be secured in itby means of a screw 56. From Fig. 4 it will be seen,-that the chuck 5passes through the nut 16, the large nave 45 of the worm wheel 15 andthe opening 46 of the support 17 upward and that the tool 6 is togetherwith the large slide 3 vertically reciprocated.

I On the rear side of the pillar 1 is fastened a bent bracket 57 (Fig.2), in which a vertical shaft 23 is mounted to turn. This shaft hasfastened on it below. a large bevel wheel 58 meshing with the said bevelwheel 52 and above a dlsk 24 provided with recess 59, in which a lever25 can be adjusted at any angle to the upper surface of the disk 24.Above the bracket 57 another bracket 60 is fastened on the pillar 1 anda short vertical rod 26 is longitudinally guided in the bracket 60, rod26 being arranged eccentrically to rod 23 and in the path of tappet 25.A helical spring 29 surrounding the rod 26 and inserted between thebracket 60 and a collar 61 on the rod tends to press the latter fromabove against the surface of the disk 24. The rotation of rod 23, willthus cause the spring-pressed rod 26 to ride along the incline of tappet25, during each rotation of disk 24, so that in this way a completerotation of rod 23, will cause an axially reciprocative movement of rod26. The rod 26 is connected with another rod 26 above by means of twouniversal joints 62, 63 and an extensible or telescopic rod 27 betweenthem. The upper rod 26 is guided in a suitable projection 64 on the leftend face of the slide 14 in Fig. 2 and is provided with a horizontal pin65, on which a springpressed pawl 28 is mounted to rock. In threesuitable bearings 66, 67, 68 on the slide 14 a shaft 21 parallel to theupper surface of the slide is mounted to turn, which has fast on it aworm 21 meshing with the worm wheel 15 and a ratchet wheel 22. The saidpawl 28 is by its spring (not shown) pressed against the periphery ofthe ratchet wheel 22. From an examination of Fig. 2 it will be evident,that on every revolution of the shaft 23 the lower rod 26 will be onceraised by the ascending upper surface of the tappet 25, whereupon itdrops under the action of the helical spring 29 on leaving the tappet25; Thereby of course also the upper rod 26 Wlll be reciprocated, sothat the pawl 28 will feed the ratchet wheel 22 one or several teethforward. By varying the inclination of the tappet 25 the feed of theratchet wheel 22 can be varied. It is further evident, that owing to thetwo universal joints 62, 63 and the telescopic rod 27 the feed of theratchet wheel 22 is not inter fered with by any longitudinal motion ofthe slide 14 nor by any inclination of the table 12 (Fig. 4).

On the upper end of the pillar 1 are fastened two vertical arms 69, 70(Fig. 1), the upper ends of which can be connected together by means ofa how 30, in which the upperpartof the tool 6 is guided. The two pendentarms of the bow 30 have each a vertical slot 71 through which andthrough a hole in the arm 69 or 70 an adjusting screw 72 passes. It willbe seen, that thereby the how 30 can be vertically adjusted to suit thetool 6.

The pattern 19 has a noncircular hole 6 with which the noncircular hole6 to be produced in the work-piece, 18 is to register. In Fig. 6 thenoncircular hole 6 in the pattern 19 is shown as hexagonal, while inFig. 7 the noncircular hole 6 is shown as a straight slot withsemicircular ends. Into the work-piece 18 invariably a circular hole 6is first bored, which is inscribed in the noncircular hole 6 to beproduced, so

that the tool 6 can be passed through it, or the work-piece 18 maytogether .with the pattern 19 be put over the tool for securing them onthe support 17.

In Fig. 5 the tool 6 is shown as cylindrical for the lower and upperends, while the intermediate portion is for the upper part 6 (see Figs.6 and 7) so cut out as to form two adjoining faces, in other words toform a wedge-shaped knife as shown, a portion of the originalcylindrical surface opposite to the vertical edge being left intact. Thelower part 6 of the said intermediate portion is similar to the upperpart 6 and differs therefrom only in that the edge is blunted, so thatthe shar edge of the upper part 6 a little projects rom the blunted edgeof the lower part 6 as is clearly shown in Fig. 5. An inclined neck 6is. formed between the two parts 6 and 6*, so as to form a cutting point6 which is capable of cutting a chip off from the work-plece 18 duringthe downward active stroke. The blunted edge of the lower part 6 servesas a stop to the work-piece l8 and as a guide for the slide 14. Thedescribed transmission from the shaft 11 by means of the two bevelwheels 52, 58 to the ratchet wheel 22 is'so arranged, that the ratchetwheel 22 is only fed forward, after the cutting point 6 during theupward return stroke has left the work-piece 18 but still remains in thenoncircular hole 6 of the pattern 19. Then under the action of theweight 34 the slide 14 with the worm wheel 15 and the support 17 will alittle shift to the left in Fig. 2 014 until the inside of the hole 6 inthe work-piece strikes and bears against the blunted edge of the lowerart 6 In this manner the proper feeding oi the circular support 17 withthe work-piece -18 and the pattern 19 on it -is insured and the cuttingpoint 6 is enabled to successively cut off chips from the work-piece 18along the periphery of the noncircular hole 6 in the pattern 19 untilthe support 17 has accomplished one revolution, when the noncircularhole 6 in the work-piece will be finished and the latter can be replacedby a fresh work-piece.

In case the maximum difl'erence between the bored hole in the work-piece18 from the outline of the noncircular hole in the pattern 19 is greaterthan the thickness of a chip, of course the support 17 with thework-piece and the pattern will require to make more than one singlerevolution until the work is finished.

As the tool 6 is required to have a tensile strength only for the work,obviously it can be made comparatively thin in diameter so that thenoncircular holes produced in the work-pieces can be made considerablysmaller than hitherto.

Evidently the active portion 6 6" of the tool may have any other crosssection if so preferred.

The machine is shown as for the most part inclosed by a casing 73 closedat the top by a. plate 7 1 and provided in the walls with two oppositecovers 7 5 and 76 for giving access to the connecting rod 9 and the disk24 with the lever 25 respectively. However, the casing is immaterial tomy invention.

The noncircular hole shaping machine operates as follows: After takingoff the bow 30 the work-piece 18 having bored in it a circular hole 6and the pattern 19 are so superposed, that the hole of the former isinscribed in the noncircular hole 6 of the latter, after which both thework-piece and the pattern 19 are secured to the support 17 by means ofthe plates 20, 20 and their adjusting screws. Then a tool 6 is selectedand is secured in the chuck 5 by means of the screw 56 and the bow 30 isreplaced, after which the pin is so adjusted in the slotted crank 10 asto obtain a stroke of the tool 6- suitable for the thickness of thework-piece 18 so that for the highest position of the tool 6 its cuttingpoint 6 still remains in the noncircular hole 6 of the pattern 19 and isabove the work-piece 18, as is shown in Fig. Thereupon the how 30 isadjusted on the two arms 69, for properly guiding the upper end of thetool 6 and the lever 25 on the disk 24: is adjusted in its inclinationfor obtaining the correct length of the feed of the cutting point 6?along the periphery of the noncircular hole 6. Then the machine isstarted and the tool 6 will work in the manner described above. When itis desired to shape noncircular holes in the Work-piece having inclinedwalls, the table 12 will require to be inclined by means of thescrewspindle 33, so that the tool 6 is parallel to the inclined wall ofthe noncircular hole 6 in the pattern 19, as is clearly shown at Fig. 4.Then the machine can bestarted for shaping the inclined Walls in thehole 6 of the work-piece. In this manner also conical noncircular holescan be. produced in-the work-piece. When lengthy holes with straightportions, such as the slot 6 in Fig. 7, are to be produced, of coursethe support 17 will require to be intermittently turned for the inclinedor curved portions of the hole 6* and to be stopped for the straightportions of this hole, so that in the latter case the pawl 28 is turnedoff out of engagement with the ratchet wheel 22 and the slide 14together with the support 17, the workpiece 18 and the pattern 19 issimply longitudinally moved by the weight 34 along the table 12, untilthe respective strai ht portion of the hole 6 ceases and the to lowinginclined or curved portion of the hole commences when the awl 28 isagain turned into engagement wlth the ratchet wheel 22.

The noncircular hole shaping machine can be varied in many respectswithout departing from the spirit of my invention as set forth in theappended clalms.

I claim:

1. In a machine of the class described, a tool adapted to be verticallyguided and having for a part a longitudinal cutting edge and for anotherpart a guiding face parallel to the cutting edge, a support adapted tohold a work-piece and a superposed pattern and having a central openingfor leaving space to said tool, means for intermittently turning saidsupport, and means for yieldingly pressing said support in one directionso as to press the walls of a hole preliminarily made in the work-pieceagainst the guiding edge of said tool.

2. In a machine. of the class tool adapted to be vertically guided andhaving it a part a longitudinal cutting edge and for another part aguiding face parallel to the cutting edge, a support adapted to hold awork piece and a superposed pattern and having a central opening, saidtool being adapted to pass through the central opening of said supportand through a noncircular hole in the pattern and through a hole boredin the work-piece, means "for intermittently turning said support aroundsaid tool, means for so adjusting the stroke of said tool that itscutting point remains for one extreme position in described, a

thehoie of the pattern without the workpiece and for the other extremeposition projects from the Work-piece, and means for yieldingly pressingthe Walls of the hole in the work-piece against the guiding face of saidtool. x

3. In a machine of the class described, a frame, a table turnable onsaid frame around a horizontal axis and having a central opening, meansfor inclining said table, a slide longitudinally guided in said tableand having a central opening, means for yieldingly pressing said slidein one longitudinal direction, a support turnable around an axis atright angles to said slide and having a central opening, said supportbeing adapted to hold a work-piece and a superposed pattern, a secondslide vertically movable in said frame, a chuck on said second slide, avertical tool adapted to be secured in said chuck and to pass upwardthrough the form for a part a longitudinal cutting edge.

and for another'part a guiding face parallel to the cutting edge,saidtool being adapted to pass through a noncircular hole in the patternand through a hole bored in the'workpiece, and means for so adjustingthe stroke of said second slide that for one extreme position the cuttinpoint of said tool remains in the hole of the pattern Without theWork-piece and for the other extreme position projects from theWork-piece.

EUGEN LAUTERJUNG. [L. s.] \Vitnesses: HELEN NUFER, ALBERT NUFER.

